Grating



L. BUSTIN Feb. 9, 1954 GRATING Filed Dec. 18, 1950 INVENTOR. LEOPOLD BUST/N ATTORNEYA Patented Feb. 9, 1954 UNITEDsTATEs PATENT oFFlcl-:

GRATING Leopold Bustin, Mamaroneck, N. Y.

' Application December 18, 1950, Serial No. 201,354

2 Claims.

' ings in automobile lubrication pits, landing craft,

other ships and conveyances, gun mounts and wherever firm foothold is required. In all applications, the grating must be V`provided with a skid-proof tread on its top surface.V In some applications it is necessary that the grating have'a skid-proof tread on its bottom surface as well. The skid-proof tread on its top surface is intended to prevent the tires of the vehicles and the boots of the workmen from skidding or slipping. The skid-proof tread on the bottom surface is intended to prevent thegrating itself from slipping or otherwise shifting on the surface which supports it.

Where the grating is used in slaughter houses, ice cream plants, and in other applications where problems of sanitation are encountered, a nonskid surface is not alone sufficient. Equally as important is a construction which can be flushed through and cleaned Without raising the grating off the floor. The construction must be such as to be free from traps where the materials being handled by the workmen might collect oraccumulate.

It is the principal object of this invention to provide a grating which possesses the following characteristics and features: it has a Vnon-skid tread on its top surface; it has a non-skid tread on its bottom surface; and it is free from traps where the materials being handled might collect.

` The grating which is herein described and claimed is provided with a plurality of spaced, pointed projections on its top surface which constitute the top tread thereof, and a plurality of spaced, pointed projections on its bottom surface which constitute its bottom tread. The top tread resists Vskidding by the tires of motor vehicles which travel on it and it resists slipping by the bootsvof workmen who stand or walk on it. The bottom tread tends to prevent the grating itself from slipping or shifting on the floor or other horizontal surface which supports it.

More specifically, the grating constituting the present invention comprises a plurality of corrugated bars which are secured to each other along their respective corrugations. Spaced openings are accordingly formed between the corrugated bars. Each bar is provided along its two side edges with a plurality of spaced, pointed projectiQDS... It is. these projections which constitute the tread of the grating when the bars are secured together along their respective corrugations.

The projections which constitute the bottom tread of the grating are the only parts of the grating that rest upon the floor. Hence it is possible to flush the grating clean without raising it up from the floor by simply washing all foreign matter through its spaced openings and through the open spaces which'separate and surround the downwardly extending pointed projections. An important feature or advantage .resulting from the presence of pointed projections on both surfaces of the grating is that either side of the grating may be used as the top tread and whether the one side or the other is used as the top tread, the grating may be flushed clean without raising it off the floor.

Preferred embodiments of this invention are shown in the accompanying drawing, in which:

Fig. 1 is a fragmentary, perspective view of one of the bars used in making the present grating, said bar being shown flat and notched along both of its side edges to provide the spaced, pointed projections herein referred to.

Fig. 2 is a similar View showing the same bar after it has been bent to form transverse corrugations.

Fig.k 3 is a side edge view of the corrugated bar shown in Fig. 2.

Fig. 4 is a perspective fragmentary view showing a part of a grating made by securing a plurality of corrugated bars together.

Fig. 5 is a sectional View on the line 5 5 of Fig. 4.

Fig. 6 is a view similar to that of Fig. 4, but showing the opposite side of the grating.

Fig. 7 is aview similar to that of Fig. 2, showing a greater number of pointed projections along.

one side edge of the bar with smaller spaces between them, than is shown along the corresponding side edge of the bar in Fig. 2.

The grating I0 shown in Figs. 4, 5 and 6 is made up of a plurality of corrugated metal bars I2 which are securely fastened together, as by means of welds I 4. Flat bar I6 shows the appearance of the corrugated bar before said bar is bent to provide its corrugations. It is, in effect, a blank from which the corrugated bar is made.

Flat bar I6 may be stamped or otherwise formed from suitable bar or strip metal, such as iron or hot or cold rolled steel. It is provided with notches I8 along one of its side edges and with notches 20 along the other of its side edges. Notches I8 and 20 are equally proportioned and equally spaced from each other, but their positions are staggered so that notches I8 are situ-` 3 ated between notches 20 and notches 20 are situated between notches i8. The notches are all provided with substantially straight edges or sides, the left edges or sides of notches t3 being substantially parallel to the right edges or sides 5 of notches 20, as viewed in Fig. 1, and the right edges or sides of notches i8 being substantially parallel to: thedeit edges. or sidessof notches; 211;. Consequently; the Width' of notclie'cYbar'u It' 'ree mains substantially constant throughout. ThislO feature provides many advantages, such as free=- dom from twisting when the bar is bent to corfrugated form.

Pointed projections 22 are formed .b'etween notches it and pointed projections.Ziareoigrned 15.

between notches 20. Like the notches, these pointed projections are equally proportioned-andi equally spaced and the pointed projections 22 are staggered. with respect to .thelatiQns of. pointed;i projections. Thus.pointedprojeotionslZ:regr- 20 ister with notches 2Q and pointed projectionsfgiT register withnotches. It. willbe understood that ythedeptli1 and Width of. the. notches fand, hence the proportionso thepoint'ed.projections, are matters of. design andengineeringwhichmayI 25 vary in accordance withthe, requirements ofthe. dierent uses to which the grating,.may.be..put', Thus the pointe'dprojections shown in Fig..llrnayy be'. much too pointedfor some applioationshnt. much'tooidullfor other applications. Thespaces 30 ietwf-:enA the pointed' projections. as shown in` Fig. l mayqlie nouclfitoo`r small iii-some .cases -and yet-much too large in` other cases.

Barit maybe bent'in'al ternately opposite dij? rections' assliownv inf Fig.' 3, to assume the ree 3,; quired vcorrugated form'. More" speeiiically the. bend lines on which the notched bar' i'isi bent' extend transversely or `the longitudinalv axis ci the-har. They areall'paralleltoeaeh other and" each-extends fromtherhigh point of a pointed projection tol the low" point of' the'notci'r which registers with said pointed projection: This cant veryreadily be seen inFig; 2; lit"A will be n'otecin Fig. 3 thatf-those-portions 25 'of` thelcorrugatedi bar which lie-Y between the; VcorrugationsU or` bends arestraigl'it,` flat portions; andit will also oe-noted 4.5 that the corrugations or bends are relativelyj sharp,` that isA they denne' an Langleoi" approxi? mately 90. This, of course, is merely-illustrant@ of l:the invention and.' notched bari ifmay lie-'bent either: to -forrn even morefacut'ecangleslor corr-- 5U versely to give itgentler 'curves alongtne hend lines anda somewhatsinuous over-all sha-peel Viewing the corrugated bar i2 in Fig. 3, itfwill'L besseen .that it iswprovided with corrugat-ionsfor bends 2S alongonesiolelthereof"andl withcorru 55 gations or bends -2 iifalong-ftlre' o ther'side thereof. Corrugationst 265 are .provided 'wtien notched b`ar= i6'. isb'emi inv one directionvand corrugaticns 1233 are. provided l when said notchedl loa-rois:l bentlinthe opposite direction.. When apliira-lity o'fcore 60 rugatedf bars. l2 are placed side-by-'side sou-that corrugations-'iof one bar: abutfcorrugations of;the adjacentbar, and saidk abutting corr-uga-v tions' are welded; riveted or 'otherwiseffsecured to each'otherfas bynrneans of welds i4; asfshown1in'E e5 Eig.. 5,.a grating-1 l'isproduced All of-"=tlf1'el pointedzprojections.oir-one side of the grating die on-.a common planeand Eall of-ithepointed'projections on the opposite sideoithe gratingffalsoftioned ,-plane.' Since.theprojections -on'one sidel of the grating are fsubstantially identicaifwithf the jprojectionson the .oppositefside-.of frthelgratt ing, in number, .proportions1andspacingafthegrate; inghas two usablesides; either.-.of..w-hic n magg-75 4 be used as the tread on which vehicles may travel and people may stand or walk.

Burl identity of the two sides or treads of the grating is not an essential element of the present invention as Fig. '7 clearly shows. A corrugated bar 3G is there shown which is similar to corrugated bar I2 except that it has relatively small projectionsgalbng one? side'gedgethereof and relatively'large projections" 3H along the opposite side edge thereof, in contrast to the projections offequal size along both side edges of corrugated ban l2. Pointed projections 32 are not only smaller than pointed projections 34 but they are alsofspacedfoloser together. Every other pro- .iectionSZ registers. with a projection 34 and intermediate projections 32 register with the low pointsaof notches 36 between said projections 34. Pointed projections 32 are used where women are employedlsoyas Atohelp prevent thefheels ot. their shoes-.trom catchinggthe projfictions;.

The f foregoinglisfillustrative. ofg the basic? prins' ciples.` of the .inventionand. itv-willbe runderstoodl. thatl.modications vandi changes may beeincorpofrated. in .the villustrated forms ofthe invention. withoutdeparting from its basiaprinciples.

Having. y thus described. my.inventionV whatA L claimA as. new` vand desire. to secure bjtlletters- Eat'entlis y n l.' A'v grating.,comprisingamnfality of vertically, disposed bars, eachof f saidbars being.y provided alongits upper andits lowened'gewithalternately.

spaced." notches., andlpointedl projections.theA apices, of the. notches along the. ulperedgevertif cally aligning with. the, .pointed-projections? onf the lower. ed'g,e, and1th e.apicesof fthe :notches on the lower edge. beingz invertical alignment with. the pointed"v proj ections. .of.- `the .uppen edge,1 saidf hars being lient. transversely. of themselves. .in al-V ternately opposite' dii'ectio'ns along.. transyerse bend lines .1 which. extend from. thelapices. of the notches on one. edge. to. the..correspending@ointelil proj ectins. ..on t',li'e.,f.1th`er edge, said b'ars...b`eing. connected'. to eacliother. .along their1 respective' lienlines .to frm -a..pli1rality, of spacedfinterstices= between them and`to..frm,on saidupperfsiie-ai plurality of anti-slip, points, at' sairli'lir'ies offconf. nection.

{ 2'." A. grating comprisingagplralitja oiverti-f-l cally disposed b'ars each bent transversely. atll spaced intervals. in alternately. oppositedirections along, vertical' .b'end'.lines,; adjacent .ib'arsb'eingI connected alongy their. verticalbendli'nesto. form..y a grating, each Yof said;` Barsfhaving. a '.V-shapech notch along its.. upper.` .edgaextendingfrom. lone. b'endline to thefnext 4to Aform.1antislipppointsf between successive notches atthe line-.offconnection, ,and V -shaped notches .alongtherlowenedfgg o'i each' of sairlf, b`a"rs. the edges offsaidt lowers notohes .being. suhstantiall`y;. parallelmto the edges.. of 'thegunperinotches-whereiy `the :low-er,notches are .staggered-with. respect ..theret,iwith lthe .apexoi'ltlie lower. notches coinciding lwith@,the Iv.be-nd, lines...

WGPGLD'BUSTINS 

